根据《就业服务与就业管理规定》，公共就业服务机构应当建立零就业家庭即时岗位援助制度，

最可能的原因是

A．喉上或喉返神经损伤

B．甲状腺功能低下

C．甲状腺危象

D．喉头水肿

E．甲状旁腺功能低下

The earned value technique is a commonly used method of performance measurement. It integrates project scope, cost, and schedule measures to help the project management team assess project performance. If a project’s Schedule Performance Index (SPI=EV/PV) value less than 1.0, it means that （）.

A．the project is ahead of its planned schedule

B．less work was completed than was planned

C．the cost overrun for work completed

D．the cost under-run of performance to date

歌舞娱乐场所、旅游景区、主题公园、游乐园、宾馆、饭店、酒吧、餐饮场所等非演出场所经营单位举办驻场涉外演出，应当报演出所在地省级文化主管部门审批。以上说法正确吗？（）

A.正确

B.不正确

Excel2013文件的扩展名是（）.

A..xlsx

B..xls

C..ppt

D..doc

下列运算（）不是余弦函数和反余弦函数的运算指令。

A.#i=TAN[#j]

B.#i=ACOS[#j]

C.#i=COS[#j]

D.#i=SIN[#j]

E.#i=ATAN[#j]